From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f80.google.com (mail-oo1-f80.google.com [209.85.161.80]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E9421371063 for ; Thu, 9 Apr 2026 07:42:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.80 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775720542; cv=none; b=R2b4PVnk7tv7a+cdrI3XOLC1u9CJBpXU+Q+XpXJgxCXn/7inDiF2BigqOfg4VOjQ2dxJ9UIhAyCQABCjKEEPOsfzdAOUzH+PWJrweVcnHKnRuFvZfBDyiOVkksjj4wmStUYDb6Bm5UmuD6eu3INmbXIuO3hymNxrqETi7tVMDNs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775720542; c=relaxed/simple; bh=DP0MaN12chIdKtctde1hPZNgioqVVK73fqKxEgc9Ikk=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=Ycaf+3D8gtx1SYf/MO0Or4GVp49bQ1N0pV+RxUM+y+uwihaM9MIPZIRpiaq0gd5rzhwnoLhq82/6Zi3jUBr8DrM8Rki4nqREfwrSG5ftlx5KJjbTHDcU9ebLP8GU8xn/hP/LQ3BoK0GUgPGgDKD+pc8Ef8NzZDiArhXpGjR62sI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.161.80 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-oo1-f80.google.com with SMTP id 006d021491bc7-689b18091ebso1488343eaf.1 for ; Thu, 09 Apr 2026 00:42:20 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1775720540; x=1776325340; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=gygayrJGgMwZqbWBI6JiR+DhqkU8Ra5y3i3FEQwb3Xk=; b=QzotdkPxTJSYFbNBG19uhPSr/F6bUoHKLskkPIY3rK+oQoOvvyVXcpqdZJ8433XmMW MtQMU1t4yEcVEVc4Qzcok4xTx+Cn//0d3nOjqy8RQRRxynOaHHGwW2gcxtOhUW4dXQIw 7rLeoTh7sjxMx5lZuC95SZed0bkSqe83oYnHcDwHRpaWQq28hhZzZ7yOpB/ompZzh5+O I5MptbxKpi9+uAm9LJ8WoGsjnKKfO7P0uhU1kY29+p2RNlDKLabXrGJ/GPCGa12bKf2s qN/DhYjttrgNxkGkLNbJArwKJfJ2Rq8qkKfHWe5LqiUf0Es2U14bEVHWgTDzbeFOT0H5 ZMhA== X-Forwarded-Encrypted: i=1; AJvYcCVk2LPCdPGHxyHZuDAMKGP1LQLHmoiJc5C2YgYlDa6U4m0SWKAvRM3m7g7/v8nEBmE2Bee6xf4HEYFN6+k=@vger.kernel.org X-Gm-Message-State: AOJu0Yyf/BfalPhXxWtAE2na88nexu4QvGLs5DxRxHuTa4I2i+1heJgd uJMPuh23R0rsEiLLROMxTVKARseuo+q4wWs5frSIiSzCHsG5l0vBUPJcOHYkgSaZLvHZX6C1Qun acVHmof5dmoqJ1AyW5OGLDSGEeLVgr7mAeDb6mU16bw0FH138JajWQxYETJ4= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a4a:c441:0:b0:682:1c53:89fc with SMTP id 006d021491bc7-68a682b1503mr888315eaf.8.1775720540016; Thu, 09 Apr 2026 00:42:20 -0700 (PDT) Date: Thu, 09 Apr 2026 00:42:19 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69d7585b.050a0220.3030df.0011.GAE@google.com> Subject: [syzbot] [bluetooth?] general protection fault in h4_recv From: syzbot To: linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, luiz.dentz@gmail.com, marcel@holtmann.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 3aae9383f42f Merge tag 'input-for-v7.0-rc6' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17814e06580000 kernel config: https://syzkaller.appspot.com/x/.config?x=5a3e5e8c17cc174e dashboard link: https://syzkaller.appspot.com/bug?extid=ff30eeab8e07b37d524e compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=108c0bd6580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11015d02580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/46384525f287/disk-3aae9383.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/bcd9d5c20ab7/vmlinux-3aae9383.xz kernel image: https://storage.googleapis.com/syzbot-assets/e4353e5e60e2/bzImage-3aae9383.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ff30eeab8e07b37d524e@syzkaller.appspotmail.com RBP: 00007ffeca659d70 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fd7d4415fac R14: 00007fd7d4415fa0 R15: 00007fd7d4415fa0 Bluetooth: Can't register HCI device Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 UID: 0 PID: 5964 Comm: syz.0.18 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 RIP: 0010:h4_recv+0x52/0x1c0 drivers/bluetooth/hci_h4.c:112 Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 3c 01 00 00 4c 8b a3 b8 01 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 31 01 00 00 49 8b 34 24 48 89 ea 41 b9 04 00 00 RSP: 0018:ffffc900037afca8 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff888033b48400 RCX: ffffffff887767b0 RDX: 0000000000000000 RSI: ffffffff8877b6a8 RDI: ffff888033b485b8 RBP: ffffc900037afd68 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000001 R14: ffff888033b484c0 R15: ffffffff8cc1b1c0 FS: 000055556677d500(0000) GS:ffff888124339000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd7d4072140 CR3: 00000000747cb000 CR4: 00000000003526f0 Call Trace: hci_uart_tty_receive+0x259/0x7e0 drivers/bluetooth/hci_ldisc.c:627 tiocsti drivers/tty/tty_io.c:2290 [inline] tty_ioctl+0x909/0x1690 drivers/tty/tty_io.c:2706 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd7d419c819 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffeca659d08 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fd7d4415fa0 RCX: 00007fd7d419c819 RDX: 0000200000000100 RSI: 0000000000005412 RDI: 0000000000000003 RBP: 00007fd7d4232c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fd7d4415fac R14: 00007fd7d4415fa0 R15: 00007fd7d4415fa0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:h4_recv+0x52/0x1c0 drivers/bluetooth/hci_h4.c:112 Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 3c 01 00 00 4c 8b a3 b8 01 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 31 01 00 00 49 8b 34 24 48 89 ea 41 b9 04 00 00 RSP: 0018:ffffc900037afca8 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff888033b48400 RCX: ffffffff887767b0 RDX: 0000000000000000 RSI: ffffffff8877b6a8 RDI: ffff888033b485b8 RBP: ffffc900037afd68 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000001 R14: ffff888033b484c0 R15: ffffffff8cc1b1c0 FS: 000055556677d500(0000) GS:ffff888124339000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd7d4072140 CR3: 00000000747cb000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: df 48 89 fisttps -0x77(%rax) 3: fa cli 4: 48 c1 ea 03 shr $0x3,%rdx 8: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) c: 0f 85 3c 01 00 00 jne 0x14e 12: 4c 8b a3 b8 01 00 00 mov 0x1b8(%rbx),%r12 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 4c 89 e2 mov %r12,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 31 01 00 00 jne 0x165 34: 49 8b 34 24 mov (%r12),%rsi 38: 48 89 ea mov %rbp,%rdx 3b: 41 rex.B 3c: b9 .byte 0xb9 3d: 04 00 add $0x0,%al --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup